The tune is where you get your biggest mileage (combined with a good CAI). The three CAI's you mentioned are all in the same range as far as ability to make power is concerened. Call Todd at Brenspeed or pick your fav tuner and they can best answer specific questions.

 

I have the 87, 91, and 93 race from Tillman as well. I wanted 3 different octanes just incase I get stuck at one of those gas stations where only one pump works.

 

nj3, tillmans loaded the 91 perf tune in so if i have to gas up and they dont sell 93 i can still have good perf with the 91 tune.